TWM562554U - Mower blade seat head - Google Patents

Abstract

The present invention relates to a lawn mower head comprising a body, a motor, a shaft, a cutter and a locking assembly. The seat defines an axial direction. The motor is disposed in the body and includes a base and a rotor. The base is disposed in the base, and the rotor is rotatably disposed on the base along the axial direction. The rotating shaft is coupled and coupled with the rotor, and the rotating shaft is provided with a positive thread portion and a reverse thread portion, and the normal thread portion is located between the reverse thread portion and the rotor. The tool includes a tool holder and a blade, the tool holder is screwed to the positive thread portion, and the blade is sleeved to the tool holder in a rotationally fixed manner. The locking component is screwed to the reverse threaded portion and the blade is abutted to the seat.

Description

Lawn mower head

This creation is about a lawn mower head.

In recent years, with the rising awareness of environmental protection, lawn mowers have generally replaced electric lawn mowers with electric lawn mowers. Electric lawn mowers have the advantages of low noise, no exhaust pollution and avoiding fuel leakage. The known electric lawn mower has a body, and the base body is provided with a rotor motor. When the rotor of the rotor motor drives the rotating shaft to rotate, the rotating shaft drives the screw sleeve of the rotating shaft to rotate, so that the mowing operation can be performed.

However, the conventional electric lawn mower has the following disadvantages. Since the blade set is screwed to the rotating shaft, if the rotating shaft and the blade set are screwed in a positive spiral manner, when the rotating shaft rotates, the blade set rotates relative to the rotating shaft due to inertia. The blade set will move away from the seat, which will cause the blade set to escape from the shaft. If the shaft and the blade are screwed in reverse spiral mode, when the shaft rotates, the blade will move toward the seat. As a result, the blade group is excessively pressed toward the seat body and the contact portion of the blade group or the seat body is broken, and there is a defect that needs to be improved.

Therefore, it is necessary to provide a novel and progressive lawn mower head to solve the above problems.

The main purpose of this creation is to provide a lawn mower head that prevents the tool from coming off the shaft and prevents the tool from squeezing toward the seat and causing the tool or seat to rupture.

In order to achieve the above object, the present invention provides a lawn mower head comprising a body, a motor, a rotating shaft, a cutter and a locking assembly. The seat defines an axial direction. The motor is disposed in the body and includes a base and a rotor. The base is disposed in the base, and the rotor is rotatably disposed on the base along the axial direction. The rotating shaft is coupled and coupled with the rotor, and the rotating shaft is provided with a positive thread portion and a reverse thread portion, and the normal thread portion is located between the reverse thread portion and the rotor. The tool includes a tool holder and a blade, the tool holder is screwed to the positive thread portion, and the blade is sleeved to the tool holder in a rotationally fixed manner. The locking component is screwed to the reverse threaded portion and the blade is abutted to the seat.

The structural features of the present invention and the intended effects thereof will be described below by way of a preferred embodiment, but are not intended to limit the scope of the present invention.

Referring to Figures 1 to 5, there is shown a preferred embodiment of the present invention. The mower head of the present invention comprises a body 1, a motor 2, a rotating shaft 3, a cutter 4 and a locking assembly 5.

The seat body 1 defines an axial direction 11.

The motor 2 is disposed in the base body 1 and includes a base 21 and a rotor 22. The base 21 is disposed in the base body 1. The rotor 22 is rotatably disposed on the base 21 along the axial direction 11. .

The rotating shaft 3 is coupled and coupled with the rotor 22. The rotating shaft 3 is provided with a positive thread portion 31 and a reverse thread portion 32. The normal thread portion 31 is located between the reverse thread portion 32 and the rotor 22.

The tool 4 includes a blade holder 41 and a blade 42. The blade holder 41 is screwed to the threaded portion 31. The blade 42 is sleeved on the blade holder 41 in a rotationally fixed manner. In the present embodiment, the blade holder 41 includes a disk body 411 and a ring wall 412. The disk body 411 is integrally formed on the outer circumferential surface of the ring wall 412. The blade 42 is sleeved on the ring wall 412. The inner circumferential surface of the wall 412 is provided with an internal thread portion 413 which is screwed to the normal thread portion 31. Preferably, the inner peripheral portion of the annular wall 412 is provided with the internal thread portion 413 adjacent to the locking assembly 5, which can limit the screwing range of the seat 41. In other embodiments, The internal thread portion can be completely extended on the inner circumferential surface of the ring wall.

The locking assembly 5 is screwed to the reverse thread portion 32 and the blade 42 is abutted against the seat 41.

In actual use, when the rotating shaft 3 is rotated in the right-hand direction, since the internal thread portion 413 of the holder 41 is screwed to the normal thread portion 31, the holder 41 and the blade 42 are opposite to each other due to inertia. The rotation shaft 3 is rotated to move slightly away from the seat body 1 , so that the tool holder 41 is prevented from being excessively tightened in the direction of the seat body 1 , and since the locking assembly 5 is screwed to the reverse thread portion 32 , The locking assembly 5 will rotate relative to the rotating shaft 3 due to inertia and move slightly toward the direction of the seat body 1 without coming out of the rotating shaft 3. The locking assembly 5 will be close to the blade 42 and the blade holder 41. The locking assembly 5 and the holder 41 are not easily loosened, and the locking assembly 5 abuts the blade 42 against the side of the disc 411 away from the motor 2, so that the blade can be 42 does not rotate relative to the holder 41.

Specifically, the rotating shaft 3 includes a large diameter section 33 and a small diameter section 34. The small diameter section 34 is disposed at one end of the large diameter section 33 away from the motor 2, and the reverse threaded portion 32 is disposed at the small diameter. The diameter portion 34 is disposed in a portion of the large diameter portion 33 adjacent to the small diameter portion 34.

In the embodiment, the locking component 5 includes a nut 51, an abutting member 52 and a spacer 53. The abutting member 52 and the spacer 53 are sleeved on the rotating shaft 3, and the nut 51 is The screw 53 is interposed between the abutting member 52 and the nut 51 , and the nut 51 is configured to face the pad 53 and the abutting member 52 toward the blade 42 . The damper 53 can provide a cushioning function to prevent the nut 51 from directly abutting against the abutting member 52, and the abutting member 52 is damaged. Further, the portion of the small diameter portion 34 away from the large diameter portion 33 is provided with the reverse thread portion 32, and the spacer 53 and the abutting member 52 are sleeved on the small diameter portion 34. The portion of the portion 32 slides smoothly relative to the small diameter segment 34.

The first base bearing 61 is disposed in the base 21, and the upper half of the rotating shaft 3 is disposed through the two first bearings 61. The two first bearings 61 can reduce the resistance of the rotating shaft 3 when rotating, so that the The rotating shaft 3 can be smoothly rotated, and the fixing body 12 is provided with a fixing piece 12, and the receiving piece 121 is provided with a second bearing 62. In the example, the fixing piece 12 is recessed toward one side of the tool 4, and the receiving groove 121 is abutted against the second bearing 62 to limit the second bearing 62 to the receiving groove. 121. The lower half of the rotating shaft 3 is disposed through the second bearing 62. The normal threaded portion 31 is located between the second bearing 62 and the reverse thread portion 32. The second bearing 62 can be laterally supported. The lower half of the rotating shaft 3, so that the lower half of the rotating shaft 3 can have sufficient lateral supporting force to avoid the shift of the rotating shaft 3, and the rotor 22 of the motor 2 and the base 21 of the motor 2 The stators are rubbed against each other and damaged, so that the life of the motor 2 can be effectively improved by the fixing piece 12 and the second bearing 62.

In summary, the mower head of the present invention, when the shaft rotates, the locking assembly will abut against the blade and the holder, and the locking assembly and the holder are not easily loosened. And the locking component is configured to abut the blade away from one side of the motor, so that the blade does not rotate relative to the seat.

1‧‧‧ body
2‧‧‧Motor
3‧‧‧ shaft
4‧‧‧Tools
5‧‧‧Locking components
11‧‧‧Axial
12‧‧‧Fixed tablets
121‧‧‧ accommodating slots
21‧‧‧Base
22‧‧‧Rotor
31‧‧‧Threaded Department
32‧‧‧Reverse thread
33‧‧‧ Large diameter section
34‧‧‧Small path
41‧‧‧Tool holder
42‧‧‧blade
411‧‧‧ dish
412‧‧‧Circle
413‧‧‧Threaded Department
51‧‧‧ nuts
52‧‧‧After the top piece
53‧‧‧shims
61‧‧‧First bearing
62‧‧‧second bearing

1 is a schematic view of the assembly of a preferred embodiment of the present invention. 2 is an exploded view of a preferred embodiment of the present invention. 3 is another exploded view of a preferred embodiment of the present invention. 4 is a partial perspective view of a preferred embodiment of the present invention. Figure 5 is a side cross-sectional view of a preferred embodiment of the present invention.

Claims (10)

A lawn mower head comprises: a body defining an axial direction; a motor disposed in the body, comprising a base and a rotor, the base being disposed in the seat, the rotor being axially Rotatingly disposed on the base; a rotating shaft coupled to the rotor and cooperating, the rotating shaft is provided with a positive thread portion and a reverse thread portion, the normal thread portion is located between the reverse thread portion and the rotor; The blade holder is disposed on the positive thread portion, and the blade is sleeved on the knife seat in a non-rotatable manner; a locking assembly is screwed on the reverse thread portion and the blade is abutted The top limit is located at the seat. The lawn mower head according to claim 1, wherein the holder comprises a disc body and a ring wall, the disc system is integrally formed on the outer peripheral surface of the ring wall, and the blade is sleeved on the ring wall, the ring The inner peripheral surface of the wall is provided with an internal thread portion that is screwed to the positive thread portion. A lawn mower head according to claim 2, wherein the locking assembly abuts the blade against a side of the disk away from the motor. The lawn mower head according to claim 2, wherein a portion of the inner circumferential surface of the ring wall is provided with the internal thread portion adjacent to the locking assembly. The lawn mower head according to claim 1, wherein the rotating shaft comprises a large diameter section and a small diameter section, wherein the small diameter section is disposed on the large diameter section away from one end of the motor, and the reverse threading section is provided. In the small diameter section, the positive thread portion is disposed on a portion of the large diameter section adjacent to the small diameter section. The lawn mower head according to claim 5, wherein the locking assembly comprises a nut, an abutting member and a gasket, the abutting member and the gasket are sleeved on the rotating shaft, the nut The screw is screwed to the reverse thread portion, and the gasket is interposed between the abutting member and the nut, and the nut abuts the gasket and the abutting member toward the blade. The lawn mower head according to claim 6, wherein the small diameter section is provided with the reverse thread portion away from the large diameter section, and the gasket and the abutting member are sleeved on the small diameter section. There is a part of the reverse thread portion. The mower head according to claim 1, wherein the base is provided with two first bearings, and the upper half of the shaft is threaded through the two first bearings, and the seat body is opposite to one end of the tool. a fixing piece is disposed, the fixing piece is provided with a receiving groove, the receiving groove is provided with a second bearing, and the lower half of the rotating shaft is disposed through the second bearing, and the positive threaded portion is located at the second bearing Between the reverse thread portion. The lawn mower head according to claim 8, wherein the fixing piece is recessed toward one side of the cutter to receive the receiving groove, the seat is abutted against the second bearing to the second bearing It is limited to the receiving slot. The lawn mower head according to claim 7, wherein the holder comprises a disc body and a ring wall, the disc system is integrally formed on the outer circumferential surface of the ring wall, and the blade is sleeved on the ring wall, the ring The inner peripheral surface of the wall is provided with an internal threaded portion, the internal threaded portion is screwed with the positive threaded portion; the locking component is configured to abut the blade against the side of the disc body away from the motor; The inner peripheral portion is provided with the internal thread portion, the internal thread portion is adjacent to the locking component; the base is provided with two first bearings, and the upper half of the rotating shaft is disposed through the two first bearings. The mounting body is further provided with a fixing piece at one end of the tool, the fixing piece is provided with a receiving groove, and the receiving groove is provided with a second bearing, and the lower half of the rotating shaft is disposed through the second bearing. a positive thread portion is located between the second bearing and the reverse thread portion; the fixing piece is recessed toward one side of the cutter to receive the receiving groove, the seat is abutted against the second bearing to The second bearing limit is located in the receiving groove.